Gel cassette opener



FIG. 1 is a front elevational view of a gel cassette opener showing our new design, the back side being a mirror image thereof;

FIG. 2 is a left side elevational view thereof, the right side being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a front perspective view thereof shown in its intended environment.

The subject matter shown in broken line in FIG. 5 represents unclaimed environmental structure which is shown for illustrative purposes and forms no part of the claimed design. 

The ornamental design for a gel cassette opener, as shown and described. 